Walter b



l W. R. LANGFORD.

PIPE WRENCH.

APPLICAHON FILED 05m27.191s.

1,3 l 0,995 Patented July 22, 1919.

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WALTER R. LANGFOBD, OF -CAIIIZQ'G'L, CALIFRNIA.

PIPE-Wannen.

Specification of Letters Patent. Patentes-d July 22, gg.

Application led December 27, 1918. Serial No. 268,531.

To all whom t may concern.'

Be it known that I, WALTER R. LANerono, a citizen of the United States,residing at Coalinga, in the county of Fresno and State of California,have invented certain new and useful Improvements in Pipe-Wrenches; andI do declare the following tobe a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make ,and use the same. j

My invention has for its object to provide an extremely simple andlinexpensive, yet a highly eilicient and reliable Wrench for pipes andother cylindrical parts, the arrangement', being such as to positivelyprevent the wrench from dropping out of place after it has once beenapplied.

With theI foregoing in view, the invention resides in the novel featuresof construction and vunique association of parts to be hereinafter fullydescribed and claimed.

Figure 1 of the accompanying drawings is a side elevation of the wrenchshowing the same in operative position upon a pipe.

Fig.' 2 is a side elevation partly in section showing the jaws releasedfrom the pipe.

Fig. 3 is a transverse section on the plane indicated by the line 3-3 ofFig. 1.

In the drawing Aabove briefly described, the numeral 1 designates apreferably straight oscillatory handle having in its front end adiagonal cam slot 2 which is preferably located at one side of thelongitudinal center of the handle as shown. Pivoted at 3 to the handlel, in rear ofthe slot To permit easy application of the tool tothe workand removal therefrom, yet to retain the jaws 5 and 7 in such relationas to extend properly around such work, the front ends of said jaws aredetachably connected by a suitable spring pressed latch 12' preferablyhoused within recesses 13.

u Positioned in front ofthe odset end 4 of. jaw 5, is a curved pipeengaging shoe l-t` having in its rear side a recess 15 into which theslotted front end of the handle 1 extends, a pin 16 being passed acrosssaid recess and throng the slot to pivotallyconnect the shoe and h dleand to project said shoe into engagement with the pipe when the handle 1is moved in onedirection (see Fig. 1) and to withdraw said shoe fromcontact with the pipe when the handle is shifted in the oppositedirection as seen in Fig. 2. When this movement of the handle takesplace, the shoe abuts the Shoulder 6 (and is thus limited in itsmovement transverse of the handle, with the result that the cam slot 2and pin 6 come into play to Withdraw said shoe from the work as in Fig.2.

From the. foregoing, it will be seen that the wrench is simple,inexpensive, highly etiicient, and durable; and since probably the bestresults are obtained from the details set forth, they are, preferablyused, but within the scope of the invention as claimed, numerous minorchanges may well be made.

I claim A pipe wrench comprising an oscillatory handle having in. itsfront end a transverse diagonal slot, a curved jawl having its rear endol'set rearwardly from the arc of said jaw and pivoted to Said handle inrear of said diagonal slot, a second curved jaw opposed to said rstnamed jaw and having its rear end offset rearwardly from the arc of thejaw and pivoted to said handle in rear ofthe pivot of said first namedjaw, means for-detachably connecting the front ends of said jaws, acurved pipe engaging shoe in front of said oiset end of the rst namedjaw and having a recess into which the slot-y ted front end of thehandle projects, and a pin extending across said recess and through saidslot, said pin and slot coaeting to force said shoe against the pipewhen the handle is moved in a direction to contract 'said jaws andserving to withdraw said shoe when the handle is moved in the oppositedirection, said irstnamedj'aw having a shoulder at the point of ofset ofits rear end to limit the movement of said shoe transversely of thehandle when the latter is moved to release the jaws.

In testimony whereof I have hereunto Set my hand.

